Help solving/ understanding (Cramers Rule)

I need help with this problem? Thanks. The numbers in parenthesis in my book are like exponenets but toward the bottom, kinda like a log number. I did't know how to write that. The answer will be x1= and x2 equals. I cant do it like a regular system of equations problem, its giving me problems. Thanks for any help..

I need help with this problem? Thanks. The numbers in parenthesis in my book are like exponenets but toward the bottom, kinda like a log number. I did't know how to write that. The answer will be x1= and x2 equals. I cant do it like a regular system of equations problem, its giving me problems. Thanks for any help..